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Encyclopedia > Scissors
Different types of scissors - paper, kitchen, sewing
Different types of scissors - paper, kitchen, sewing

Scissors are types of tools used for cutting thin material which requires little force. Scissors are a tool used for cutting. ... pic of scissors, taken by Tarquin 13:09 29 Jun 2003 (UTC) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... A modern hammer is directly descended from ancient hand tools A tool or device is a piece of equipment which typically provides a mechanical advantage in accomplishing a physical task, or provides an ability that is not naturally available to the user of a tool. ... For other uses, see Force (disambiguation). ...


They are used for cutting, for example: paper, cardboard, metal foil, thin plastic, food, cloth, rope, and wire. Scissors can also be used to cut hair. For other uses, see Paper (disambiguation). ... Paperboard is a paper-like material, usually over ten mils (0. ... Metal leaf processing Metal leaf is a thin foil used for decoration. ... For other uses, see Plastic (disambiguation). ... It has been suggested that Textile be merged into this article or section. ... Coils of rope used for long-line fishing A rope (IPA: ) is a length of fibers, twisted or braided together to improve strength for pulling and connecting. ... A wire is a single, usually cylindrical, elongated strand of drawn metal. ... For the 1968 stage production, see Hair (musical), for the 1979 film, see Hair (film). ...


Unlike a knife, a pair of scissors consist of two pivoted blades, each called a scissor. Most types of scissors are not particularly sharp; it is primarily the shearing between the two blades which cuts. Children's scissors are even less sharp, and the blades are often protected with plastic. This article is about the tool. ... Shearing in continuum mechanics refers to the occurrence of a shear strain, which is a deformation of a material substance in which parallel internal surfaces slide past one another. ... A male Caucasian toddler child A child (plural: children) is a young human. ... For other uses, see Plastic (disambiguation). ...

Contents

Mechanics

Mechanically, scissors are a first-class, double-lever with the pivot acting as the fulcrum. For cutting thick or heavy material, the mechanical advantage of a lever can be exploited by placing the material to be cut as close to the fulcrum as possible. For example, if the applied force (i.e., the hand) is twice as far away from the fulcrum as the cutting location (e.g., piece of paper), the force at the cutting location is twice that of the applied force at the handles. Specialized scissors, like bolt cutters exploit leverage by having a long handle but placing the material to be cut close to the fulcrum. Scissors cut material by applying a local shear stress at the cutting location which exceeds the material's shear strength. Image File history File links Download high resolution version (600x1185, 46 KB) Schere File links The following pages link to this file: Scissors ... For the Portuguese town and parish, see Lever, Portugal. ... Look up Fulcrum in Wiktionary, the free dictionary. ... In physics and engineering, mechanical advantage (MA) is the factor by which a mechanism multiplies the force put into it. ... Bolt cutters A bolt cutter is a scissors-like tool used for cutting heavy chains, bolts and wire mesh. ... Shear stress is a stress state where the stress is parallel or tangential to a face of the material, as opposed to normal stress when the stress is perpendicular to the face. ... Shear strength in engineering is a term used to describe the strength of a material or component against the type of yield or structural failure where the material or component fails in shear. ...


History

Scissors from 2nd Century Turkey
Scissors from 2nd Century Turkey

It is most likely that scissors were invented in 1500 BC in ancient Egypt. [1] These were likely shears with the joint at the far end. [2] Cross-bladed scissors were invented by Romans around AD 100. Image File history File linksMetadata Download high-resolution version (1366x1683, 617 KB) [edit] Summary This picture was taken at the Metropolitan Museum in New York City in 2006 by Yannick Trottier. ... Image File history File linksMetadata Download high-resolution version (1366x1683, 617 KB) [edit] Summary This picture was taken at the Metropolitan Museum in New York City in 2006 by Yannick Trottier. ... The 2nd century is the period from 101 - 200 in accordance with the Julian calendar in the Christian Era. ...


An immense stride in perfecting scissors was taken in 1761 when Robert Hinchliffe produced the first pair of modern-day scissors made of hardened and polished cast steel. He lived in Cheney Square, London and was reputed to be the first person who put out a signboard proclaiming himself "fine scissor manufacturer".[3] This article is about the capital of England and the United Kingdom. ...


In a part of Sweden (now in Finland) an ironworks was started 1649 in the hamlet "Fiskars" between Helsinki and Turku. In 1830 a new owner started the first cutlery works in Finland, making among others scissors with the trade mark Fiskars. Fiskars Corporation introduced new methods in the manufacturing of scissors in 1967.[4]. Location of Helsinki in Northern Europe Coordinates: , Country Province Region Uusimaa Sub-region Helsinki Charter 1550 Capital city 1812 Government  - Mayor Jussi Pajunen Area  - Total 187. ... Location of Turku in Northern Europe Coordinates: , Country Finland Province Western Finland Region Finland Proper Sub-region Turku sub-region Government  - Mayor Mikko Pukkinen Area  - City 306. ... Liberty Leading the People by Eugène Delacroix commemorates the July Revolution 1830 (MDCCCXXX) was a common year starting on Friday (see link for calendar). ... Fiskars Corporation is a metal and consumer brands company founded in 1649 in Fiskars bruk, today Fiskars ruukki in the municipality of Pohja, Finland, located about 100 kilometres west of Helsinki along the ancient mainroad from Turku to Viipuri. ...


Kitchen scissors

A pair of kitchen scissors
A pair of kitchen scissors

Kitchen scissors, also known as kitchen shears, are similar to common scissors. The main difference is the location of the fulcrum. Kitchen scissors have the fulcrum located farther from the handles to provide more leverage and thus more cutting power. High quality kitchen scissors can easily cut through the breastbone of a chicken. Image File history File linksMetadata Download high-resolution version (2592x1944, 1876 KB)[edit] Summary I took it myself. ... Image File history File linksMetadata Download high-resolution version (2592x1944, 1876 KB)[edit] Summary I took it myself. ... This article or section does not adequately cite its references or sources. ...


Left handed scissors

left-handed (left) and right-handed (right) scissors
left-handed (left) and right-handed (right) scissors

Most scissors are best suited to use with the right hand, but left handed scissors are designed for use by the left. Left handed scissors have handles which are comfortable to hold in the left hand. Because scissors have overlapping blades, they are not symmetric. This asymmetry is true regardless of the orientation and the shape of the handles: the blade that is on top always forms the same diagonal regardless of orientation. Human hands are also asymmetric and when closing the thumb and fingers do not close vertically, but have a lateral component to the motion. Specifically, the thumb pushes out and fingers pull inwards. For right-handed scissors held in the right hand, the thumb blade is closer to the body so that the natural tendency of the right hand is to force the cutting blades together. Conversely, if right-handed scissors are held in the left hand, the natural tendency of the left hand would be to force the cutting blades laterally apart. Furthermore, with right-handed scissors held by the right-hand, the shearing edge is visible, but when used with the left hand the cutting edge of the scissors is behind the top blade, and one cannot see what is being cut. Image File history File links Download high-resolution version (840x777, 31 KB) [edit] Summary [edit] Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Scissors ... Image File history File links Download high-resolution version (840x777, 31 KB) [edit] Summary [edit] Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Scissors ...


Some scissors are marketed as ambidextrous. They have symmetric handles so there is no distinction between the thumb and finger handles, and they have very strong pivots so that the blades simply rotate and do not have any lateral give. However, most "ambidextrous" scissors are in fact still right-handed. Even if they successfully cut, the blade orientation will block the view of the cutting line for a left-handed person. True ambidextrous scissors are possible if the blades are double-edged and one handle is swung all the way around (to almost 360 degrees) so that the back of the blades become the new cutting edges[2]. Patents (U.S. Patent 3,978,584 ) have been awarded for true ambidextrous scissors. Ambidexterity is the ability of being equally adept with each hand (or, to a limited degree, feet). ... This article describes the unit of angle. ...


Using scissors designed for the wrong hand is difficult for most people, even for left-handers who have become accustomed to using the more readily available right-handed scissors. They have to unnaturally force the blades together to cut and stretch their necks over the top blade to see what is being cut. This unnatural motion can also cause marks on the hand, sores, and eventually calluses. This article is about calluses and corns of human skin. ...


Shears

Lever shears (goldsmith tool)
Lever shears (goldsmith tool)

Although often used interchangeably with "scissors," the term shears is reserved by those in the industry for scissors longer than 15 cm[5]. Others assert scissors are symmetric whereas shears distinguish between the thumb hole and the finger hole[6]. Like scissors, shears combine slightly offset jaws to cut material through physical shear, and combine this with levers to apply a considerable shear force. Shears are usually intended for cutting much heavier material than scissors. Image File history File links Metadata Size of this preview: 450 × 600 pixelsFull resolution (2448 × 3264 pixel, file size: 1. ... Image File history File links Metadata Size of this preview: 450 × 600 pixelsFull resolution (2448 × 3264 pixel, file size: 1. ... A goldsmith creating a new ring A goldsmith is a metalworker who specializes in working with precious metals, usually to make jewelry. ... For the Portuguese town and parish, see Lever, Portugal. ...


Specialized scissors

Scissors from the Chinese Tang dynasty (618-907 AD)
Scissors from the Chinese Tang dynasty (618-907 AD)

There are several specialized scissors and shears used for different purposes. Some of these are: Image File history File linksMetadata Download high-resolution version (1913x446, 187 KB) [edit] Summary This picture was taken at the Metropolitan Museum in New York City by Yannick Trotier in 2006. ... Image File history File linksMetadata Download high-resolution version (1913x446, 187 KB) [edit] Summary This picture was taken at the Metropolitan Museum in New York City by Yannick Trotier in 2006. ... For the band, see Tang Dynasty (band). ... Events End of the Sui Dynasty and beginning of the Tang Dynasty in China. ... Events Oleg leads Kievan Rus in a campaign against Constantinople Yelü Abaoji establishes Liao (Khitan) dynasty Births Deaths Categories: 907 ...

In the following, the blades meet and compress the material instead of shearing it so they are technically not scissors: Pinking shears Pinking shears are scissors, the blades of which are sawtoothed instead of straight. ... Tin snips are tools used to cut thin sheet metal. ... Sheets of stainless steel cover the Chrysler Building Thin sheets of gold leaf Sheet metal is simply metal formed into thin and flat pieces. ... Corrugated galvanised iron, commonly abbreviated CGI, is a building material composed of sheets of hot-dip galvanised mild steel cold-rolled to have a linear corrugated pattern in them. ... Sheares are doubled-bladed cutting implements with straight blades of between 200mm and 300mm. ... Secateurs, also called hand pruners, or loppers are a type of long scissors, with which one can prune branches of trees and shrubs. ... Loppers Loppers are a type of scissors used for pruning twigs and small branches. ... The coniferous Coast Redwood, the tallest tree species on earth. ... A broom shrub in flower A shrub or bush is a horticultural rather than strictly botanical category of woody plant, distinguished from a tree by its multiple stems and lower height, usually less than 6 m tall. ... Trauma shears, often known by the nickname tuff cuts, are scissors used by paramedics and other emergency medical personnel. ... For other uses, see Grass (disambiguation). ... To meet Wikipedias quality standards, this article or section may require cleanup. ... A throatless shear is a cutting tool used to make complex straight and curved cuts in sheet metal. ... Medium fine Merino shearing Lismore, Victoria Sheep shearing, typically just called shearing, is the process by which the woolen fleece of a sheep is removed. ... For other uses, see Wool (disambiguation). ... ... This article does not cite any references or sources. ... Cosmetology is the study of skin, hair and nails and includes, but is not limited to, manicures, pedicures, application of artificial nails, special occasion hairstyling, shampooing hair, cosmetic application, body hair removal, chemical hair relaxers or straighteners, permanent waves, coloring and highlighting of hair, and hair extensions or wig treatments. ... A hairdresser is someone whose occupation is to cut or style hair, in order to change or maintain a persons image as they desire. ...

  • Bolt cutters cut through heavy wire and bolts.
  • Nippers cut small pieces out of tile.
  • Hemostat resembles a pair of scissors but has a locking clamp instead of a blade; it is used in surgery and does not cut at all.
  • Pliers used for holding and crimping metal or wire.

Bolt cutters A bolt cutter is a scissors-like tool used for cutting heavy chains, bolts and wire mesh. ... A nipper or a pair of nippers (like a pair of scissors) may also be a mechanical device used to nip or remove small amounts of a hard material, such as pieces of a tile which needs to be fitted around an odd shape. ... Mission, or barrel, roof tiles A tile is a manufactured piece of hard-wearing material such as ceramic, stone, porcelain, metal or even glass. ... Hemostats, curved and straight tip. ... “Surgeon” redirects here. ... Needle-nose pliers Pliers are hand tools, designed primarily for gripping objects by using leverage. ... Crimp or crimping can mean: Crimp (gambling) Crimp (wool) Crimp (joining) Crimp (recruitment) Crimp (climbing) Grain crimping Hair crimping Crimping Pliers This is a disambiguation page: a list of articles associated with the same title. ...

Notes

  1. ^ http://inventors.about.com/library/inventors/blscissors.htm
  2. ^ http://www.everything2.com/index.pl?node=scissors
  3. ^ http://freepages.history.rootsweb.com/~exy1/fh_material/18C_sheffield/ch4.txt
  4. ^ http://www.fiskars.fi/pdf/Fiskars_history_eng.pdf
  5. ^ [1]
  6. ^ http://www.canadacutlery.com/product/facts_on_scissors.pdf
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Scissors

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Scissors are cutting instruments consisting of a pair of metal blades connected in such a way that the blades meet and cut materials placed between them when the handles are brought together.
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